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Honai Formation Kudo et al., 2011
Invalid synonym: Myogadani Formation, Yanagisawa Formation
- Type locality: Fukushima, Kamo city, Niigata prefecture
- Coherent formation
- Pleistocene (1.3 Ma or later)
- Sedimentary facies: Marine, Fluvial
- Sedimentary facies: Shoreface, Foreshore, River, Delta, Transgressive lag
- Lithofacies: Sands, Gravels
- Lithofacies (Minor): Mud, Sandy mud
- Sedimentary structures: Parallal stratification, Low angle wedge-shaped cross-stratificaiton, Trough cross-stratification, Planar cross-stratification, Swaley cross-stratificaiton, Wave ripples, Imbrication
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Fukushima - Jojo, Kamo city, Niigata pref.; Higashiosaki, Sanjo city, Niigata pref.; Yashiroda, Akiha-ku, Niigata city, Niigata pref.; Myoga valley, Tagami city, Niigata pref.
- Fossils: Plants, Trace fossils
- Tephra: Kamonuka Tuff
- Shimazu et al. (2014) Jour. Geol. Soc. Japan, vol.120, no.7, pp.247-253 DOI
- Kudo et al. (2011) Geology of the Kamo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 162p. (in Japanese with English abstract 4p.)